Newcastle's bid to become the NRL era's first champions from outside the top four follows three finals upsets.
The Knights face heavily favoured Sydney, which is playing its first grand final in seven years.
A Roosters victory would end the competition's 50-point grand-final curse.
Both qualifying-final winners, despite their week off, have been eliminated.
Sydney can score quickly, but discipline and defensive consistency remain concerns.
Robinson's side showed resolve late in the season, routing the Dolphins in Brisbane as Sam Walker returned from a syndesmosis injury.
Walker was back in record time, and Sydney enjoyed two more recovery days than Newcastle.
The Knights came from behind to beat Penrith on Sunday at Homebush, spending 46 minutes with 12 players.
Kalyn Ponga and Sandon Smith, outstanding since moving to halfback, lead Newcastle's attacking threat.
The decider could be free-flowing, although both sides can also handle a grinding game.